Mansfield Toilet Dissassembly

Depending on what part of the Mansfield toilet needs repairing, different pieces may need to be dissassembled / replaced. Typically problems related to a running toilet will either stem from a problem with the Float Ball or from the Flush Valve.

Once you take the back lid off of the tank you’ll see two main components – the Ballcock (which the Float Ball attaches to) and the Flush Valve.

The purprose of the float arm in a Mansfield toilet is to control the water level within the tank. When the float arm reaches a certain level, the tank will stop filling with water. This level can be adjusted by turning the screw located at the opposite end from the Float Ball. What should the level be set to? Most (if not all) Mansfield toilets that I have seen have a water line mark on the back of the tank. If you tighten the screw, the water level will lower and if you loosen the screw it will raise.

The entire float ball and arm can be removed by turning the cap at the top of the Ballcock counterclockwise. Once it is off a small plastic ‘button’ will be exposed which can just be pulled off. This button is used to provide a footing for the screw from the Float Ball arm. Beneath it are two rubber discs which can be pulled up with relative ease. Be sure to check these discs for any debris buildup.

On to the Flush Valve Float

At the top of the flush valve float is a rubber refill tube which can be pulled out fairly easily; it might seem a little snug, but that should be because it is a tight fit. Once the refill tube has been removed you should be able to remove the cap at the top by turning it counter clockwise. Once this cap comes off you can lift up the outer casing and you should be able to slide the Trip Lever off with relative ease. At the bottom of the casing is another rubber seal; be sure to check that for any debris which may have built up.

Once the Flush Valve casing is out of the way, a red rubber seal should be visible at the bottom. This particular seal seems to be one of the most common fail points for running Mansfield toilets. To remove this seal you can just pull the old one off (you may have to stretch it a little bit, or it may crack if it is old and brittle). Replacing it can be a tad trickier though as there are actually two separate grooves. You will need to make sure that you get the red rubber seal on snuggly in the top groove.

A couple of tips for getting the red ring on if it gives you some grief:

  • You should be able to get it in the groove and then physically turn it so you move it to harder to fit areas.
  • A butter knife may be able to help get the ring snuggly in the groove.

That in a nutshell is how you can disassemble the most common areas required when repairing a Mansfield toilet.

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